SYNOPSIS
$o = Acme::Product->get(1234);
$v = $o->create_view(
toolkit => 'xml',
aspects => [
'id',
'name',
'qty_on_hand',
'outstanding_orders' => [
'id',
'status',
'customer' => [
'id',
'name',
]
],
],
);
$xml1 = $v->content;
$o->qty_on_hand(200);
$xml2 = $v->content;